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Author: search.filters.author.Phatsornsiri, PunnavichSubject: search.filters.subject.bulk-driven MOS transistor

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    0.5-V Mixed-Mode Universal Active Filter Using Multiple-Input OTAs
    (2024-01-01)
    Phatsornsiri, Punnavich
    ;
    Kumngern, Montree
    ;
    Nonthaputha, Thanat
    ;
    Asa, Ekachai
    ;
    Singsathien, Jateslid
    This study introduces new 0.5 V, ultra-low power mixed-mode universal analog filter applying multiple-input operational transconductance amplifiers (MI-OTAs). The filter configuration based on MI-OTAs and two grounded capacitors to actualize a mixed-mode universal filter that can produce four modes second-order filters, that is low-pass, high-pass, band-pass, band-stop and all-pass filters, namely voltage-mode, current-mode, transimpedance mode, transconductance-mode, by appropriate selecting input signals. The filter's natural frequency can be electronically controlled. The mixed-mode filter was analyzed using CMOS 0.18μm process simulation from TSMC, operating with a 0.5 V power supply.
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    0.5-V 16 nW Low-Pass Filter for Bio-Signal Applications
    (2024-01-01)
    Phatsornsiri, Punnavich
    ;
    Kumngern, Montree
    ;
    Khateb, Fabian
    ;
    Kulej, Tomasz
    ;
    Wongprommoon, Natapong
    This study presents a low-voltage, ultra-low power fully-differential low-pass filter for bio-signal applications using multiple-input fully differential operational transconductance amplifiers (MIFD OTA). This work shows that a low-pass filter using multiple-input OTA can reduce the number of OTAs and power consumption. The low-pass filter can be applied to biomedical signal processing applications. The low-pass filter was simulated using the 0.18 μm (CMOS) technology from TSMC with a supply voltage of 0.5 V. The simulation result shows that the filter has a static power consumption of 16 nW and a 140-Hz bandwidth when operating from a supply voltage of 0.5 V. Input frequency of 10 Hz with an amplitude of 220 mV, the new proposed filter provides a dynamic range of 72.2 dB, total harmonic distortion of 1 %.